Window-lock



I. WIERNIKOWSKI.

wmoow LOCK.

APPLiCATlQN FILED MAR. 5. 1921.

1,399,177. Patented Dec. 6, 1921.

v I 2 SHEETS- SHEET 1- a (h V I ATTORNEY I WIERNIKOWSKI.

WINDOW LOCK.

APPLICATION men MAR-5.1921,

1,399,177. Patented Dec. 6, 1921.

2 SHEET$-SHEET 2 s F mar/Aa- UV VEN TOR [Mk/7117b wsk/ A TTOR E Y UNITED STATES PATENT- OFFICE.

IGNACY WIERNIKOWSKI, OF NEW YORK, N. Y., ASSIGNOR OF FORTY-FIVE PER CENT.

TO HENRY MOLENDA, OF OLLIE, MONTANA.

WIND OW-LO CK.

Specification of Letters Patent.

Patented Dec. 6, 1921.

Application filed March 5, 1921. Serial No. 449,822.

To all whom it may concern:

Be it known that I, IGNACY WVIERNIKOW- SKI, a citizen of Poland, residing at New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Window- Locks, of which the following is a specification.

The main object of this invention is the provision of a safe and easily operable window lock, simple in construction and inexpensive in cost of manufacture.

The above and other objects will become apparent in the description below, in which like-named characters of reference refer to like-named parts in the drawings.

Referring briefly to the drawings, Figure 1 is a perspective view of a window showing my lock applied.

Fig. 2 is a plan view of my lock per 86.

Fig. 3 is a perspective view of one of the members of my lock.

Fig. at is a cross-sectional view on the line l -l of Fig. 2.

Fig. 5 is a perspective view of the bolt of my lock.

Referring now in detail to the drawings, the numeral 1 represents one of the base members of my lock, and 2 the other, the former being applied by means of holes 3 to the upper edge of the lower window frame, and the latter being applied by means of similar holes 3 to the lower member of the upper window frame. A screw-stem 4 is secured in the member 1 and thereto is pivotally attached a rotatable bolt 5 flush with said base members.

One end of said bolt is enlarged at 6 and is hollowed out to provide compartment 7 therein. A stem 8, having a head 9, is slidably mounted in said compartment, said head lying above the enlarged end 6, and the lower extremity 11 of the stem 8 extends below the lowermost point of the member 5. A collar 10 rigid with said stem limits the downward motion of said stem, and a coiled spring 12 surrounding said stem normally urges the same downward.

A. recess 14 is provided as shown in the member 1 and adapted to receive the end 11 of the stem 8. Another recess 13 is provided for a similar purpose. The end 15 of the bolt 5 is forked as shown at 16 providing a recess 17. A substantially T-shaped member 18 extends rigidly upward from the base 2, the neck of said member being en gageable by the fork 16, in the recess 17.

Referring to Fig. 2, it is apparent that, in order to open the lock, the head 9 is lifted by the fingers and the end 11 is lifted from the recess 14: against the force of the spring 12. The bolt is then turned 90 degrees in a clockwise direction, releasing the member 18, and in its new position the end 11 of the stem 8 is forced by the spring 12 into the recess 13. It is thus apparent that the lock cannot be opened from without without breaking the glass of the window, as the resilient locking means described securely holds the bolt in locked position.

I claim: 7 i

A device of the class described comprising a pair of base members adapted to be secured to adjacent window frames, a bolt rotatably mounted on one of said members, a substantially T-shaped member rigid with the other of said members, the end of said bolt being forked, said forked end being engageable with said second member, the other end of said bolt being enlarged and having compartment therein, a stem slidably mounted in said enlarged end and lying within said compartment, a head on said stem outside said enlarged end, a collar rigid to said stem near the lower end thereof, the lower end of said stem extending beyond .Jiid bolt. a spring normally urging said lower end of said stem out of said compartment, and recesses in said first-mentioned base member, adapted to receive said end of said stern.

In witness whereof I aflix my signature.

IGNACY WIERNIKOWSKI. 

